A computer password generally consists of eight characters from letters (con- sider only lower cases) and digits 0 9 that can be re-used (it is OK to have a password like "aabb7800"). A valid password for a certain system should contain exactly two digits and all characters are used only once. What is the probability a password is valid for the system? (Factorial/combination/permutation expressions are OK, no need to simplify.)

A computer password generally consists of eight characters from letters (con- sider only lower cases) and digits 0 9 that can be re-used (it is OK to have a password like "aabb7800"). A valid password for a certain system should contain exactly two digits and all characters are used only once. What is the probability a password is valid for the system? (Factorial/combination/permutation expressions are OK, no need to simplify.)

College Algebra

10th Edition

ISBN:9781337282291

Author:Ron Larson

Publisher:Ron Larson

Chapter8: Sequences, Series,and Probability

Section8.6: Counting Principles

Problem 74E: Lottery Powerball is a lottery game that is operated by the Multi-State Lottery Association and is...

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